| **Web / Mobile**: Frontend applications that users interact with, handling UI/UX, user input capture, and response display

**[WebSocket](https://developer.mozilla.org/en-US/docs/Web/API/WebSocket) / [SSE](https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events) Server**: Real-time communication server (such as [FastAPI](https://fastapi.tiangolo.com/)) that manages client connections, handles streaming protocols, and routes messages between clients and ADK

**Agent**: Custom AI agent definition with specific instructions, tools, and behavior tailored to your application's needs | **[LiveRequestQueue](https://github.com/google/adk-python/blob/main/src/google/adk/agents/live_request_queue.py)**: Message queue that buffers and sequences incoming user messages (text content, audio blobs, control signals) for orderly processing by the agent

**[Runner](https://github.com/google/adk-python/blob/main/src/google/adk/runners.py)**: Execution engine that orchestrates agent sessions, manages conversation state, and provides the `run_live()` streaming interface

**[LLM Flow](https://github.com/google/adk-python/blob/main/src/google/adk/flows/llm_flows/base_llm_flow.py)**: Processing pipeline that handles streaming conversation logic, manages context, and coordinates with language models

**[GeminiLlmConnection](https://github.com/google/adk-python/blob/main/src/google/adk/models/gemini_llm_connection.py)**: Abstraction layer that bridges ADK's streaming architecture with Gemini Live API, handling protocol translation and connection management | **[Gemini Live API](https://ai.google.dev/gemini-api/docs/live)**: Google's real-time language model service that processes streaming input, generates responses, handles interruptions, supports multimodal content (text, audio, video), and provides advanced AI capabilities like function calling and contextual understanding |